On technical standpoint Facebook still a strongest growth engine of silicon valley. However amid controversy of irresponsibly leaking personal data by third party app created concerns for increased regulation by policy makers and demise of trust among users. Investors have been spooked enough to sell off FB and pushing market value about seven percent on intraday trades.
Despite of this setback and extended sell off for upcoming few trades, The underlying momentum is too strong to topple significantly. It could be expected that trend for now is lag behind but eventually catch up with expected growth level. Perhaps concerning factor is additional time spend to catch up this level which is essentially loss of value . One possibility that could cover this loss is relatively cheaper FB can now induce new Acquisition Frenzy( Wink Wink Really Great idea for Fund Managers out there).
In conclusion It is good time to buy this security if you're sitting on large capital and looking for opportunity to buy large Growth Stock.